<template>
  <view v-if="goods_info.goods_name" class="goods_detail_container">
    <!-- 轮播图 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" circular>
      <swiper-item v-for="(item,index) in goods_info.pics" :key="index">
        <image :src="item.pics_big" @click="preview(index)"></image>
      </swiper-item>
    </swiper>
    
    <!-- 商品信息区域 -->
    <view class="goods_info">
      
      <view class="price">￥{{goods_info.goods_price}}</view>
      
      <view class="goods_info_body">
        <view class="goods_name">{{goods_info.goods_name}}</view>
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      
      <view class="yf">快递：免运费</view>
    </view>
    
    <!-- 商品介绍富文本 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    <!-- 商品导航组件 -->
    <view class="goodsNav">
      <uni-goods-nav fill :options="options" :buttonGroup="buttonGroup" @click="handleLeftClick" @buttonClick="handleRightClick"></uni-goods-nav>
    </view>
  </view>
</template>

<script>
import {goodsDetailData} from '../../service/goodsDetail_api.js'
import { mapState, mapMutations, mapGetters } from 'vuex'
  export default {
    computed:{
      ...mapState('m_cart',['cart']),
      ...mapGetters('m_cart',['total'])
    },
    
    watch:{
      //监听详情页购物车显示数量
      total:{
        handler(newVal){
          const findResult = this.options.find( item => item.text === '购物车')
          if(findResult){
            findResult.info = newVal
        }
      },
      //页面加载时就立即监听
      immediate: true
      }
    },
    data() {
      return {
        goods_info:{},
        options: [{
            icon: 'shop',
            text: '店铺',
            infoBackgroundColor:'#007aff',
            infoColor:"red"
        }, {
            icon: 'cart',
            text: '购物车',
            info: 0
        }],
        buttonGroup: [{
          text: '加入购物车',
          backgroundColor: '#ff0000',
          color: '#fff'
        },
        {
          text: '立即购买',
          backgroundColor: '#ffa200',
          color: '#fff'
        }
        ]
      }
    },
    
    onLoad(options){
      const goods_id = options.goods_id
      this.getGoodsDetail(goods_id)
    },
    
    methods: {
      //获取详情页数据
      async getGoodsDetail(id){
        const res = await goodsDetailData(id)
        // 除去富文本介绍显示的图片间隔问题：替换字符串添加block样式
        // 解决ios图片不正常显示问题：替换图片后缀名改为jpg
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,'<img style="display:block;" ').replace(/webp/g,'jpg')
        this.goods_info = res.message
      },
      
      //点击轮播图预览
      preview(index){
        uni.previewImage({
          current:index,
          urls: this.goods_info.pics.map( item => item.pics_big)
        })
      },
      
      // 导航左侧按钮处理
      handleLeftClick(e){
        if(e.content.text === '购物车'){
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      
      // 导航右侧按钮处理
      handleRightClick(e){
        if(e.content.text === '加入购物车'){
          // 组织商品信息对象
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          
          this.addToCart(goods)
        }
      },
      
      ...mapMutations('m_cart',['addToCart'])
    },
    
  }
</script>

<style lang="scss">
.goods_detail_container{
  
  padding-bottom:50px;
}
swiper{
  height:750rpx;
  
  image{
    width:100%;
    height:100%;
  }
}

.goods_info{
  
  padding:10px;
  padding-right:0;
  .price{
    color:#C00000;
    font-size:18px;
    margin:10px 0;
  }
  
  .goods_info_body{
    display: flex;
    justify-content: space-between;
    .goods_name{
      font-size:14px;
      margin-right:10px;
    }
    
    .favi{
      width:120px;
      font-size:14px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border-left:1px solid #efefef;
      color:gray;
    }
  }
  
  .yf{
    font-size:13px;
    color:gray;
    margin:10px 0;
  }
}

.goodsNav{
  position:fixed;
  bottom:0;
  left:0;
  width:100%;
}
</style>
